5277540e37
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198 Add base support to handle #VC exceptions. Update the common exception handlers to invoke the VmgExitHandleVc () function of the VmgExitLib library when a #VC is encountered. A non-zero return code will propagate to the targeted exception handler. Under SEV-ES, a DR7 read or write intercept generates a #VC exception. To avoid exception recursion, a #VC exception will not try to read and push the actual debug registers into the EFI_SYSTEM_CONTEXT_X64 struct and instead push zeroes. The #VC exception handler does not make use of the debug registers from the saved context and the exception processing exit code does not attempt to restore the debug register values. Cc: Eric Dong <eric.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Eric Dong <eric.dong@intel.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
61 lines
1.6 KiB
INI
61 lines
1.6 KiB
INI
## @file
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# CPU Exception Handler library instance for DXE modules.
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#
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# Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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##
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[Defines]
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INF_VERSION = 0x00010005
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BASE_NAME = DxeCpuExceptionHandlerLib
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MODULE_UNI_FILE = DxeCpuExceptionHandlerLib.uni
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FILE_GUID = B6E9835A-EDCF-4748-98A8-27D3C722E02D
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MODULE_TYPE = DXE_DRIVER
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VERSION_STRING = 1.1
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LIBRARY_CLASS = CpuExceptionHandlerLib|DXE_CORE DXE_DRIVER UEFI_APPLICATION
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#
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# The following information is for reference only and not required by the build tools.
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#
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# VALID_ARCHITECTURES = IA32 X64
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#
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[Sources.Ia32]
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Ia32/ExceptionHandlerAsm.nasm
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Ia32/ExceptionTssEntryAsm.nasm
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Ia32/ArchExceptionHandler.c
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Ia32/ArchInterruptDefs.h
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[Sources.X64]
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X64/Xcode5ExceptionHandlerAsm.nasm
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X64/ArchExceptionHandler.c
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X64/ArchInterruptDefs.h
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[Sources.common]
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CpuExceptionCommon.h
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CpuExceptionCommon.c
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PeiDxeSmmCpuException.c
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DxeException.c
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[Pcd]
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gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard
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gUefiCpuPkgTokenSpaceGuid.PcdCpuStackSwitchExceptionList
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gUefiCpuPkgTokenSpaceGuid.PcdCpuKnownGoodStackSize
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[Packages]
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MdePkg/MdePkg.dec
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MdeModulePkg/MdeModulePkg.dec
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UefiCpuPkg/UefiCpuPkg.dec
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[LibraryClasses]
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BaseLib
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SerialPortLib
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PrintLib
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SynchronizationLib
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LocalApicLib
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PeCoffGetEntryPointLib
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MemoryAllocationLib
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DebugLib
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VmgExitLib
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